Predictive modeling of meteoroid fragmentation-source spectra

Develop a fully predictive model that links detailed meteoroid fragmentation physics to the initial infrasound source spectrum.

Background

The paper represents fragmentation-generated acoustic emissions as point sources of N-waves in order to isolate altitude-dependent near-source spectral filtering. However, meteoroid entry can also involve distributed ablation, ballistic cylindrical shocks, and complex fragmentation episodes, so the initial acoustic spectrum is not determined solely by the idealized point-source representation. A model connecting the physical details of fragmentation to the emitted infrasound spectrum would enable more complete and quantitatively predictive treatment of source geometry and spectral evolution.

References

Quantifying the fraction of aerodynamic drag energy that couples into the cylindrical blast wave for this event will require dedicated aerodynamic/acoustic coupling analysis and is left for future work.

— Period-Inverted Blast-Radius Normalization for a Non-Ablating Hypersonic Reentry Source Using OSIRIS-REx Capsule Infrasound  (2609.19141 - Silber, 16 Sep 2026) in Section 4.1, Implications for Cylindrical Blast Wave Normalization

A fully predictive model linking detailed fragmentation physics to the initial infrasound source spectrum remains an open problem.

— Altitude-Dependent Near-Source Spectral Filtering of Meteor Infrasound Above 80 km and Consequences for Period-Based Energy Estimates  (2608.13853 - Silber et al., 14 Aug 2026) in Section 3.3, Near-Source Dissipation Modeling